static void adjust_frame_information(ChannelElement *cpe, int chans)
{
int i, w, w2, g, ch;
- int start, maxsfb, cmaxsfb;
+ int maxsfb, cmaxsfb;
+ IndividualChannelStream *ics;
- for (ch = 0; ch < chans; ch++) {
- IndividualChannelStream *ics = &cpe->ch[ch].ics;
- start = 0;
- maxsfb = 0;
- cpe->ch[ch].pulse.num_pulse = 0;
+ if (cpe->common_window) {
+ ics = &cpe->ch[0].ics;
for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
- for (w2 = 0; w2 < ics->group_len[w]; w2++) {
- start = (w+w2) * 128;
+ for (w2 = 0; w2 < ics->group_len[w]; w2++) {
+ int start = (w+w2) * 128;
for (g = 0; g < ics->num_swb; g++) {
- //apply M/S
- if (cpe->common_window && !ch && cpe->ms_mask[w*16 + g]) {
+ //apply Intensity stereo coeffs transformation
+ if (cpe->is_mask[w*16 + g]) {
+ int p = -1 + 2 * (cpe->ch[1].band_type[w*16+g] - 14);
+ float scale = cpe->ch[0].is_ener[w*16+g];
+ for (i = 0; i < ics->swb_sizes[g]; i++) {
+ cpe->ch[0].coeffs[start+i] = (cpe->ch[0].pcoeffs[start+i] + p*cpe->ch[1].pcoeffs[start+i]) * scale;
+ cpe->ch[1].coeffs[start+i] = 0.0f;
+ }
+ } else if (cpe->ms_mask[w*16 + g] &&
+ cpe->ch[0].band_type[w*16 + g] < NOISE_BT &&
+ cpe->ch[1].band_type[w*16 + g] < NOISE_BT) {
for (i = 0; i < ics->swb_sizes[g]; i++) {
cpe->ch[0].coeffs[start+i] = (cpe->ch[0].pcoeffs[start+i] + cpe->ch[1].pcoeffs[start+i]) * 0.5f;
cpe->ch[1].coeffs[start+i] = cpe->ch[0].coeffs[start+i] - cpe->ch[1].pcoeffs[start+i];
}
start += ics->swb_sizes[g];
}
+ }
+ }
+ }
+
+ for (ch = 0; ch < chans; ch++) {
+ IndividualChannelStream *ics = &cpe->ch[ch].ics;
+ maxsfb = 0;
+ cpe->ch[ch].pulse.num_pulse = 0;
+ for (w = 0; w < ics->num_windows; w += ics->group_len[w]) {
+ for (w2 = 0; w2 < ics->group_len[w]; w2++) {
for (cmaxsfb = ics->num_swb; cmaxsfb > 0 && cpe->ch[ch].zeroes[w*16+cmaxsfb-1]; cmaxsfb--)
;
maxsfb = FFMAX(maxsfb, cmaxsfb);